Both teenagers are alreayd on profressional terms at Elland Road, but with their contracts due to expire at the end of the season they have been aiming to impress the senior boss with a view to extending their stay.
The duo both scored for the Under-21s side on Monday, but Evans was quick to warn the players that they must convince him that they have the potential to make the step up to first-team level if they are to earn a new deal.
Evans told the Post: "They have to earn themselves a contract beyond this season. If we are planning for the future, believe me, scoring for the under-21s is a long way from scoring in the first team.
"But both boys are giving themselves every opportunity. Their training performances are now being monitored more closely than they have ever been before. It is why they are suddenly being pitched into the under-21s on a more regular basis, starting games.
"It’s because we need to make a decision... whether they can add something to go forward. If their abilities stick out and say they should be in the first team, I don’t care if they are 15, 16, 18 or 35. At this minute in this, there’s players in front of those."
Leeds have developed a reputation as being one of the best clubs in Britain for producing youth talent, with Evans' current squad including academy graduates such as Lewis Cook, Alex Mowatt and Charlie Taylor.
Over the years numerous stars of the future have been nurtured and given their breakthrough into senior football at Elland Road, including players such as Gary Speed, Fabian Delph, and James Milner.